ARCH needs to be defined (any value should do), make addon build logs…

… available

.github/workflows/documentation.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
-          python-version: 3.12
+          python-version: "3.12"
           cache: pip
 
       - name: Create installation directory
@@ -110,6 +110,7 @@ jobs:
       - name: Rebuild keywords
         continue-on-error: true
         run: |
+          export ARCH="linux"
           export ARCH_DISTDIR="$(grass --config path)"
           export TOP_DOCS_DIR="${ARCH_DISTDIR}/docs"
           export VERSION_NUMBER="$VERSION"
@@ -135,3 +136,11 @@ jobs:
           name: mkdocs-site
           path: ${{ env.MKDOCS_DIR }}/site
           retention-days: 3
+
+      - name: Make logs available
+        uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
+        continue-on-error: true
+        with:
+          name: grass-addon-build-logs
+          path: mv addons-build-dir/docs/logs
+          retention-days: 3